Hey Dominik,
The 460s have two different water pump housings: with and without a dipstick hole. Here's mine showing (not very well but best I can do at the moment) the water pump housing location for the hole:
There's just a plastic cap on the hole at the time the picture was taken but that is where the dipstick goes.
In the US it's pretty simple to go to a junk yard, whoops, auto recycling yard and get whichever type you need.
I also see some on eBay; do a search on '460 timing'.
BTW I use and very heartily recommend the Canton 7 QT road racing pan.
Tom